Grouped product quantities suddenly linked

Hi
I just migrated my site. Everything moved over perfectly except for one strange occurrence. I show product on a grouped page. If you hit the plus or minus for quantity is changes it for all the products on that page rather than just the items you are selecting. It did not do this before I moved my site but I see no setting where one would change this.

The page I need help with: [log in to see the link]